The discovery that Stevie was keeping secrets forces River to reassess how well he knew his colleague and friend. Unlocking her voicemails throws suspicion on somebody close to Stevie; somebody with real motive and a history of violence.

Cast: Stellan Skarsgård, Nicola Walker, Lesley Manville, Adeel Akhtar, Eddie Marsan, Georgina Rich, Sorcha Cusack, Steve Nicolson, Turlough Convery, Owen Teale, Michael Maloney, Jim Norton, Amelia Lowdell, Julian Lewis Jones, Peter Bankole